172223939 has 2 divisors, whose sum is σ = 172223940. Its totient is φ = 172223938.

The previous prime is 172223917. The next prime is 172223963. The reversal of 172223939 is 939322271.

It is a weak prime.

It is an emirp because it is prime and its reverse (939322271) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 172223939 - 2¹⁶ = 172158403 is a prime.

It is a super-2 number, since 2×172223939² = 59322170329351442, which contains 22 as substring.

It is a Chen prime.

It is equal to p_9620498 and since 172223939 and 9620498 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (172223339) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 86111969 + 86111970.

It is an arithmetic number, because the mean of its divisors is an integer number (86111970).

Almost surely, 2^172223939 is an apocalyptic number.

172223939 is a deficient number, since it is larger than the sum of its proper divisors (1).

172223939 is an equidigital number, since it uses as much as digits as its factorization.

172223939 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 40824, while the sum is 38.

The square root of 172223939 is about 13123.4118658221. The cubic root of 172223939 is about 556.3710269163.

The spelling of 172223939 in words is "one hundred seventy-two million, two hundred twenty-three thousand, nine hundred thirty-nine".